/* ═══════════════════════════════════════════════════════════════════
   Football Genius — Left Sidebar Navigation (Premium)
   ═══════════════════════════════════════════════════════════════════ */

/* ─── Sidebar Container ──────────────────────────────────────────── */
.sidebar {
  position: fixed;
  top: 0;
  left: 0;
  width: var(--sidebar-collapsed);
  height: 100vh;
  background: linear-gradient(180deg, rgba(8,22,12,0.98), rgba(5,14,8,0.99));
  border-right: 1px solid rgba(46,204,113,0.06);
  z-index: 40;
  display: flex;
  flex-direction: column;
  padding: 0;
  overflow: hidden;
  transition: width 0.35s cubic-bezier(0.4,0,0.2,1);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  box-shadow: 4px 0 32px rgba(0,0,0,0.4);
}

/* Subtle pitch-line texture */
.sidebar::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    repeating-linear-gradient(
      180deg,
      rgba(46,204,113,0.012) 0px,
      rgba(46,204,113,0.012) 1px,
      transparent 1px,
      transparent 48px
    );
  pointer-events: none;
  z-index: 0;
}

.sidebar.expanded { width: var(--sidebar-width); }

/* ─── Sidebar Header (toggle only, no logo) ──────────────────────── */
.sidebar-header {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 18px 12px;
  border-bottom: 1px solid rgba(46,204,113,0.05);
  position: relative;
  z-index: 1;
  min-height: 64px;
}

/* ─── Toggle Button ──────────────────────────────────────────────── */
.sidebar-toggle {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  background: rgba(46,204,113,0.06);
  border: 1px solid rgba(46,204,113,0.1);
  color: var(--accent);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.25s ease;
  z-index: 50;
}
.sidebar-toggle:hover {
  background: rgba(46,204,113,0.12);
  border-color: rgba(46,204,113,0.25);
  box-shadow: 0 0 16px rgba(46,204,113,0.12);
  transform: scale(1.05);
}
.sidebar-toggle svg {
  width: 16px;
  height: 16px;
  fill: none;
  stroke: currentColor;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
  transition: transform 0.35s cubic-bezier(0.4,0,0.2,1);
}
.sidebar.expanded .sidebar-toggle svg {
  transform: rotate(180deg);
}

/* ─── Navigation Links ───────────────────────────────────────────── */
.sidebar-nav {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding: 8px 6px;
  overflow-y: auto;
  overflow-x: hidden;
  position: relative;
  z-index: 1;
}

.sidebar-link {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 10px 10px;
  border-radius: 14px;
  text-decoration: none;
  color: rgba(255,255,255,0.45);
  font-weight: 600;
  font-size: 13px;
  transition: all 0.25s cubic-bezier(0.4,0,0.2,1);
  position: relative;
  white-space: nowrap;
  overflow: hidden;
  border: 1px solid transparent;
}

.sidebar-link:hover {
  color: rgba(255,255,255,0.9);
  background: rgba(46,204,113,0.06);
  border-color: rgba(46,204,113,0.08);
}

/* Active state — premium glow */
.sidebar-link.active {
  color: #fff;
  background: linear-gradient(135deg, rgba(46,204,113,0.1), rgba(200,169,78,0.04));
  border-color: rgba(46,204,113,0.12);
}
.sidebar-link.active::before {
  content: '';
  position: absolute;
  left: 0;
  top: 8px;
  bottom: 8px;
  width: 3px;
  border-radius: 0 4px 4px 0;
  background: linear-gradient(180deg, var(--accent), var(--accent-2));
  box-shadow: 0 0 10px rgba(46,204,113,0.5), 0 0 20px rgba(46,204,113,0.2);
}

/* Icon container */
.sidebar-icon {
  width: 46px;
  height: 46px;
  min-width: 46px;
  border-radius: 12px;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  background: rgba(255,255,255,0.03);
  border: 1px solid rgba(255,255,255,0.04);
  transition: all 0.25s ease;
}
.sidebar-link:hover .sidebar-icon {
  background: rgba(46,204,113,0.08);
  border-color: rgba(46,204,113,0.12);
  transform: scale(1.05);
}
.sidebar-link.active .sidebar-icon {
  background: linear-gradient(135deg, rgba(46,204,113,0.15), rgba(200,169,78,0.08));
  border-color: rgba(46,204,113,0.2);
  box-shadow: 0 0 16px rgba(46,204,113,0.1);
}

/* Image icons (game mode logos) */
.sidebar-link.has-img-icon .sidebar-icon {
  background: linear-gradient(180deg, rgba(22,28,30,0.96), rgba(8,12,14,0.98));
  border-color: rgba(255,244,214,0.18);
  box-shadow:
    inset 0 1px 0 rgba(255,255,255,0.08),
    0 8px 16px rgba(0,0,0,0.22);
  overflow: hidden;
}
.sidebar-link.has-img-icon .sidebar-icon::before {
  content: '';
  position: absolute;
  inset: 4px;
  border-radius: 9px;
  background: radial-gradient(circle at 50% 38%, rgba(255,248,220,0.12), transparent 70%);
  pointer-events: none;
}
.sidebar-icon-img {
  width: 78%;
  height: 78%;
  object-fit: contain;
  border-radius: 8px;
  transition: transform 0.25s ease, filter 0.25s ease;
  filter:
    brightness(1.06)
    contrast(1.12)
    saturate(1.04)
    drop-shadow(0 2px 6px rgba(0,0,0,0.42))
    drop-shadow(0 0 8px rgba(255,248,220,0.08));
  position: relative;
  z-index: 1;
}
.sidebar-link:hover .sidebar-icon-img {
  transform: scale(1.08);
  filter:
    brightness(1.1)
    contrast(1.14)
    saturate(1.06)
    drop-shadow(0 4px 10px rgba(0,0,0,0.42))
    drop-shadow(0 0 10px rgba(255,248,220,0.14));
}
.sidebar-link.active .sidebar-icon-img {
  filter:
    brightness(1.12)
    contrast(1.16)
    saturate(1.08)
    drop-shadow(0 4px 10px rgba(0,0,0,0.44))
    drop-shadow(0 0 12px rgba(255,248,220,0.16))
    drop-shadow(0 0 18px rgba(212,175,55,0.14));
}
.sidebar-link[data-game="unscramble"] .sidebar-icon-img,
.sidebar-link[data-game="guess"] .sidebar-icon-img {
  width: 124%;
  height: 124%;
  max-width: none;
  max-height: none;
}
.sidebar-link.has-img-icon:hover .sidebar-icon {
  background: linear-gradient(180deg, rgba(28,36,38,0.98), rgba(10,14,16,1));
  border-color: rgba(255,244,214,0.24);
  box-shadow:
    inset 0 1px 0 rgba(255,255,255,0.1),
    0 0 18px rgba(255,248,220,0.08);
}
.sidebar-link.has-img-icon.active .sidebar-icon {
  background: linear-gradient(135deg, rgba(34,43,45,0.98), rgba(12,17,19,1));
  border-color: rgba(255,238,186,0.28);
  box-shadow:
    inset 0 1px 0 rgba(255,255,255,0.12),
    0 0 20px rgba(255,238,186,0.1),
    0 0 28px rgba(212,175,55,0.08);
}
.sidebar-link[data-game="unscramble"]:hover .sidebar-icon-img,
.sidebar-link[data-game="guess"]:hover .sidebar-icon-img {
  transform: scale(1.26);
}

/* SVG icons */
.sidebar-icon svg {
  width: 20px;
  height: 20px;
  fill: currentColor;
  opacity: 0.6;
  transition: opacity 0.2s;
}
.sidebar-link:hover .sidebar-icon svg,
.sidebar-link.active .sidebar-icon svg {
  opacity: 1;
}

/* Text label */
.sidebar-label {
  opacity: 0;
  width: 0;
  overflow: hidden;
  transition: opacity 0.2s 0.05s, width 0.3s;
  font-family: 'Outfit', sans-serif;
  letter-spacing: 0.01em;
  font-size: 13px;
}
.sidebar.expanded .sidebar-label {
  opacity: 1;
  width: auto;
}

/* Keep collapsed-mode icon buttons visually centered */
.sidebar:not(.expanded) .sidebar-link {
  justify-content: center;
  gap: 0;
  padding: 10px 6px;
}

.sidebar:not(.expanded) .sidebar-link.active::before {
  left: 4px;
  top: 9px;
  bottom: 9px;
}

/* ─── Tooltip (collapsed) ────────────────────────────────────────── */
.sidebar:not(.expanded) .sidebar-link:hover::after {
  content: attr(data-tooltip);
  position: absolute;
  left: calc(100% + 14px);
  top: 50%;
  transform: translateY(-50%);
  padding: 8px 14px;
  border-radius: 10px;
  background: rgba(8,22,12,0.96);
  border: 1px solid rgba(46,204,113,0.12);
  color: #fff;
  font-size: 12px;
  font-weight: 600;
  white-space: nowrap;
  z-index: 100;
  box-shadow: 0 8px 24px rgba(0,0,0,0.5);
  pointer-events: none;
  animation: tooltipIn 0.15s ease-out;
  letter-spacing: 0.02em;
}

@keyframes tooltipIn {
  from { opacity: 0; transform: translateY(-50%) translateX(-6px); }
  to   { opacity: 1; transform: translateY(-50%) translateX(0); }
}

/* ─── Sidebar Footer ─────────────────────────────────────────────── */
.sidebar-footer {
  padding: 14px;
  border-top: 1px solid rgba(46,204,113,0.04);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  z-index: 1;
}
.sidebar-footer small {
  color: var(--muted);
  font-size: 10px;
  opacity: 0;
  transition: opacity 0.25s;
  letter-spacing: 0.05em;
}
.sidebar.expanded .sidebar-footer small { opacity: 0.5; }

/* ─── Mobile ─────────────────────────────────────────────────────── */
.sidebar-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.6);
  z-index: 35;
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
}
.sidebar-overlay.visible { display: block; }

.sidebar-hamburger {
  display: none;
  position: fixed;
  bottom: 24px;
  left: 24px;
  width: 56px;
  height: 56px;
  border-radius: 16px;
  background: linear-gradient(135deg, var(--accent), #1fa855);
  border: none;
  cursor: pointer;
  z-index: 45;
  box-shadow: 0 8px 32px rgba(46,204,113,0.3), 0 2px 8px rgba(0,0,0,0.2);
  color: #fff;
  font-size: 22px;
  align-items: center;
  justify-content: center;
  transition: all 0.25s cubic-bezier(0.4,0,0.2,1);
}
.sidebar-hamburger:hover {
  transform: translateY(-2px) scale(1.04);
  box-shadow: 0 12px 40px rgba(46,204,113,0.4);
}

@media (max-width: 768px) {
  .sidebar {
    transform: translateX(-100%);
    width: var(--sidebar-width);
    box-shadow: 8px 0 40px rgba(0,0,0,0.6);
  }
  .sidebar.mobile-open {
    transform: translateX(0);
  }
  .sidebar-toggle { display: none; }
  .sidebar .sidebar-label { opacity: 1; width: auto; }

  .sidebar-hamburger {
    display: flex;
  }
}